Sectional cam for ore-stamps.



PAVTENTED NOV. 10, 90

M 11 L v T 1 L S 0 W B m m. n A

SEGTIONAL 0AM F0 L10 TIOK PI D Nrrsn Patented ivovemter 10, 1905.

SECTIONAL CAM FOR ORE-STAM PS.

SPECIFIC ATION forming part of Letters Patent No. 743,681, datedNovember 10, 1903. Application filed February 1903. Serial No.145.194.(No model.)

To a whom it may concern:

Be it known that 1, AUGUST P. J. BOSSELL, a citizen of the UnitedStates, residing at Angels Camp, countyof Galaveras, State ofCalifornia, have invented an Improvement in Sectional Cams forOre-Stamps;'and I hereby declare the following to be a full, clear, andexact description of the same.

My invention relates to improvements in cams for lifting stamps inquartz and like mills. Its object is to provide a cam which can bequickly put on and taken ofi of a shaft without disturbing the othercams on the shaft or without the necessity of dismantling nearly theentire battery, as is so often the case in mills where the ordinarysolid one-piece cams are used; also to provide a simple means ofsecurely locking the cam on the shaft without weakening any of theparts.

The invention consists of a two-part cam of the following description,having reference to the accompanying drawings, in which- Figure 1 is aside elevation with hub in section on line y y, Fig. 2. Fig. 2 is an endview in partial section on line a; m, Fig. 1. Fig. 3 is a reducedperspective of the two parts.

A A represent two complementary inter-' changeable cam-sections of equalsize having the respective interlocking huh portions a a. The line ofseparation between the two sections is of such character and is solocated in relation to the striking-surfaces of the cam that when apoint strikes and lifts a tappet the tendency of the sections toseparate will be neutralized as far as possible and undue strain on thecam relieved. The sections are divided at nearly opposite points on thehub on lines substantially within the ends of the cams. The back of eachsection carries a curved tang or segmental bracket 2, which bears uponthe hub portion of the opposite section and serves to resist the thrustexerted by the cam-points striking the tappet.

Each hnb'section is provided with a curved recess 3, of which itsrespective bracket 2 forms the outer wall, into which recess is let acorresponding projection 4 on the opposite section.

In each section the projection d is nearly diametrically opposite to thecurved tang 2 of the same section, and the arc inclosed between theseparts is greater than a half-circle.

The only way to unite the two sections is to slip them togethersidewise. The parts have a snug sliding fit, and when the opposedcam-points are brought into the same plane the sections form one rigidstructure capable, by reason of the brackets 2 and the interlockingprojections 4, of resisting a very considerable amount of strain withoutother securing means. However, in order to further strengthen the camand render it absolutely stanch and rigid a ring or tire 5 is driven onover the united huh, and to prevent the ring working loose set-screws 6may be employed to engage in a peripheral groove 7 in the hub.

The means of attaching and looking a cam to a shaft is as follows: Eachhub-section has a cam-groove 8 in the surface which bears on the shaft.These grooves are parallel with the plane of the cam, or, in otherwords, run

in a direction around the shaft and areentirely within the hub, so thatwhen the cam is locked on a shaft, as 9, neither the grooves nor the key10 which they contain is visible. These grooves are so disposed inrelation to each other that each has its deepest part contiguous to theother, so that when the sections are united, as in Fig. 1, the groovesin the two hubs will be continuous and eccentric to the hub-bore andshaft.

The key 10 is a segmental wedge adapted to seat in the groove of eithersection and to have its exposed surface concentric withthe surface ofthe walls of the bore when its thicker end is flush with the edge ofsection A, as indicated in Fig. 1. The key is held from turningindependently of the shaft by means of a projection 11 fitting a recessin the shaft. In operation section A, with key in position as in Fig. l,is laid against the shaft with the key and cam-face turned in thedirection of contemplatedrotation and projection ll engaged in the notchin the shaft, and section A then slipped in from the side to engage Aand inclose the shaft, and the ring 5 (which, with the rings necessaryfor the other cams, has been slipped onto the shaft before the latter isfinally set in its bearings) driven onto the hub. The shaft and key willbe stationary in relation to each other, while the cam will be turnableto a limited degree about the key and shaft. As the shaft is turned inthe direction of the arrow, the moment the cam strikes a tappet the cammovement will be arrested an instant till the continued rotation of theshaft drives the key into the shallower portion of the groove of sectionA to form a frictional bond between the cam and shaft, whereupon the camand shaft are revolved as one rigid unitary structure.

The walls of the keyways in the hub serve as guides to preventabsolutely any side slip or shift of the cam on the shaft.

When itis desired to remove a cam, it is a simple matter on stopping theshaft to turn the cam in the opposite direction to bring the line, asindicated by 1), between the hub-sections coincident with thicker end ofthe key, whereupon on the removal of ring 5 the sections are easilyslipped apart.

In order to locate the position of the end of the key, the shaft isprovided with-a mark outside the hub and in line with the key end. Whenline b coincides with that mark, it is known that the parts are in therequired position. I

The ad vantages of such a cam construction may be summarized as follows:The cams can be quickly put on and taken olT of a shaft Withoutdisturbing the other parts of a battery and are adjustable as right orleft cams, according to the direction in which they turn. By disposingthe holes for the projections 11 of the keys at suitable points alongand around the shafts the cams are quickly adapted to any system ofstamp-drop either for splash or wash batteries. The locking means isconcealed, and in no way does it weaken the shaft or cam. The key beingsegmental bears on a large area of the cam and shaft, and with theotherwise close fit of the cam on the shaft the cam is supportedpractically at all points. The shoulders or tangs hearing I theirbearing-surfaces,

each on the complementary section afiord an additional support to thering.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is

1. In a cam, the combination of two separable members havinginterlocking hub-sections divided on lines substantially within the endsof the cam, each of said cam members formed integral with a curved tangor segmental flange which overlaps the line of division of the hub andis adapted to bear upon an opposite hub-section, each hub-section havinga curved recess of which the segmental flange forms an outer wall and aprojection on one section adapted to fit the recess of the opposingsection, and said sections having cam-grooves in their bearing-surfaces,and a segmental key slidable in said grooves.

2. An improved cam consisting of two separable members havinginterlocking hub-sections divided on lines substantially Within the endsof the cam, each of said members formed with a curved or segmentalflange which overlaps the line of division of the hub and bears upon anopposite hub'section, each hub-section having in its meeting face arecess, one wall of which is formed by said flange, and the projectionof one section adapted to fit the recess of the opposing section, saidhub-sections having cam-grooves in a segmental key incased and slidablein said cam-grooves, there being a projection on the key engaging arecess in the shaft to lock the key thereto, and a ring embracing thehub-sections.

In witness whereof I have hereunto set my hand.

AUGUST P. J. BOSSELL.

Witnesses:

A. T. LEE, 0. H. ALLEN.

